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Finding the Fourth Proportional to 86,999.64, 130,549.74 and 47,018.79

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Solution

The fourth proportional to 86,999.64, 130,549.74 and 47,018.79 is: 70,555.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,999.64 : 130,549.74 = 47,018.79 : x
  2. Step 2: Convert to fraction form
    86,999.64/130,549.74 = 47,018.79/x
  3. Step 3: Cross multiply
    86,999.64x = 130,549.74 × 47,018.79
  4. Step 4: Simplify right side
    86,999.64x = 6,138,290,809.61
  5. Step 5: Solve for x
    x = 6,138,290,809.61/86,999.64
  6. Step 6: Final answer
    x = 70,555.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.